Abstract
The dynamics of single water molecules in bulk and at interfaces is studied by means of molecular dynamics simulations. We use a recently developed stochastic method based on the Fokker-Planck equation to disentangle the contributions of the free energy and diffusivity profiles on the local dynamics. The strong variations found in the diffusivity profiles are crucial for accurately modeling the water kinetics. A comparison of hydrophobic and hydrophilic substrates and solutes yields significant differences in the diffusivities, which can be attributed to the presence of hydrogen bonds.
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Sedlmeier, F., von Hansen, Y., Mengyu, L. et al. Water Dynamics at Interfaces and Solutes: Disentangling Free Energy and Diffusivity Contributions. J Stat Phys 145, 240–252 (2011). https://doi.org/10.1007/s10955-011-0338-0
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DOI: https://doi.org/10.1007/s10955-011-0338-0